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S. L. VAN DER MEULEN.

G FACETS OF A PREDETERMINED WIDTH 0N GLASS PLATES.

APPLICATION FILED MAR. 31, 19'9- APPARATUS FOR GRINDIN 2 SHEETS-SHEET 1.

S. L. 1m? aier Mew en.

Patented July 15, 1919.

S. L. VAN DER MEULEN. APPARATUS FOR GRINDING FACETS OF A PREDETERMINED WIDTH 0N GLASS PLATES. APPLICATION FILED MAR. 31. l9l9.

1 ,3 1 0,263 Patented July 15, 1919.

2 SHEETS-SHEET 2- 1 der SYBRAN'DUSLAURENTIUS VAN nan MEULEN, F LEEUW :JEN', NETH RLANDS.

' APPARATUS FOR GRINDING FACETS OF A PREDETEBMINED WIDTH ON GLASS PLATES.

Specification of Letters Patent.

Patented July is, rare.

Application filed March 81, 1919. Serial No. 286,405.

To all whom it may concern: I l I .Be it known that I, SYBRANDUS LAUREN- TIUS VAN DER MEULEN, a citizen of the Kingdom of the Netherlands, residing at Leeuw'arden, Grachtswal 97499, Netherlands,

have invented certain new and useful Improvements in Apparatus for Grinding Facets of a Predetermined lVidth on Glass Plates, of which the following is a specification.

The invention relates to an apparatus for grinding facets of a predetermined Width onglass plates, which is, in a well-known manner provided with a horizontal "grinding roller, traveling longitudinally to and fro and with a framework, for supporting the glass plates, cooperating with the'roller and which can be adjusted under different angles with regard to the roller.

According to the invention the glass plates, to be ground, are'carried by a sledge sliding across. the framework toward the roller.

The glass plates are fixed on the sledge, in a direction opposite to the rotation of the roller, by ad ustable binding blocks or the like. The sledge is moved by a lever, movably connected with the framework, the free end of the lever bein by a tackle, to the ot er side by a balance weight. The positionof the sledge at the beginning of the operation is determined by a fixed stop of the framework,'to which the sledge can be brou ht by the'tackle, the position to which the s edge is moving under the influence of the weight being determined by a lug on the sledge and by a stop plate with steps, which may be adjusted on the framework according to the desired width of the facets. As the lass plates lie on a sledge, which is move? glass plates across the framework, the position of the glass with regard to its support remains unaltered during the grinding period, which excludes damage of the glass surface.

With the apparatus it is possible to grind a number of glass plates of different sizes at the same time without prolix adjustment of levers, while the device can be arranged for any desired facet depth, simply by adjusting the apparatus with steps at the framework.

. Moreover it is immediately evident if the facets have obtained their desired depth. As soon s the lug on the sledge has firmly actuated to one side down, together with the of the apparatus and F'g. 2 is a view of part of Fig. 1 as see from the right.

In the drawings 1 is the grindin'g roller, fixed on ahorizontal shaft 2, which can be 7 driven for instance by a pulley with belt.

During the grinding the roller can he slid to and fro in the direction of the shaft 2 in a well-known manner which is not further shown in the drawings. The framework supporting the glass plates under treatment 1s arranged adjacent to the roller. This framework consists in side pieces 4 and length beams'5, connecting the side pieces with brackets 6, turning around a shaft 7 "which is supported by bearings 8 on sliding I'BJlS. By fitting these hearings on sliding rails, it is possible to remove the framework with appurtenances after wearing of the ing slot 10 and bolt 11, cooperating with the upper ends of the side pieces 4.

According to the invention the framework is-carrying a sledge consisting of side pieces 12 and length beam's'13 connecting the side pieces. This sledge can be raised or lowered by two levers 14:, one on each end applicating on bolts 15 and 16. Both levers 141 are connected with each other by a rod 17, on which is working at one side a weight 19 by means of a rope 18 and at the other side a Westontackle 20. The sledge can he slid till the back part is stopped by a stop 21 of the framework. Battens 22 having grooves 23 are fixed on the sledge for supporting the glass plates under treatment. Bindingblocks 24 are found between the grooved battens which can be fixed by bolt and thumb nut arrangements 25 in any height of the battens.

The framework is further on both sides provided with a fixed plate 26 where along a brake plate 27 with steps, for a lug 28 at both sides of the sledge, can be adjusted by bolt and slot 29 so that the lug 28 comes to arest against one of the steps of the brake or stop plate in dependency of the adjustment.- I

The apparatus works as follows:

By the 'Weston tackle 20 the levers 14 are drawn to the right side and thereby the sledge is raised till its back-end is stop ed against the stop 21 of the framework t en the glass plates are laid on the grooved battens with their surfaces to be ground in contact with the roller and thereupon the blocks 24: are fixed against the outer sides of the glass plates by the bolts and winged nuts. When the sledge is wholly covered with glass plates in this manner,'the tackle is given so much play, that the weight 19 can exercise its influence. The sledge with the glass plates fixed upon it will then be pressed down with the glass against the roller and y the glass will be ground away till the lugs 28 come to a rest against the steps of the stopping plates 27 of the framework which have beforehand been adjusted.

lhis plate has in the represented engine four steps for the grinding of facets of for instance 3, 21;, 2 and 14 centimeter depth.

What I claim is: k

1. In an apparatus of the character de scribed, the combination with a rotatable grinding roller and a frame mounted so it may be swung toward and from the roller, of a sledge shiftable on the frame, plateglass supporting and clamping means on the sledge, levers pivotally connected to the oppositeeends of the frame and operably associated with the sledge and having the upground by the roller.

2. In an apparatus of the character described'including in combination with a rotatable grinding roller and a frame mounted so as to be swung toward and away from the roller, a sledge mounted on the frame and capable of being shifted toward or away from the roller, battens carried by the sledge for supporting pieces of plate-glass, binding blocks for preventing accidental displacement of the glass, levers pivoted to the ends of the frame and operably associated with the ends of the sledge, a rod connecting the upper ends of the levers, a cable connected-to the rod, a tackle'connected with one end of the cable and operable to swing the levers and consequently shift the sledge outwardly on the frame, a weight connected with the opposite end of the cable for holding the glass in close relation to the roller a stop "on the frame for limiting outward movement of the sledge,.stop-plates provided with steps and adjustably connected to theends of the frame, and lugs on the ends of the sledge for coacting with any of the steps on the stop-plates for limiting inward movement of the sledge. 1 J

In testimony whereof, I afi'ix my signature.

srenliuius LAUEENTIUS .vm ma neuter. 

